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Subtract 14/30 from 21/40

21/40 - 14/30 is 7/120.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 30 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 40 × 3 = 120,
    21/40 = 21 × 3/40 × 3 = 63/120
  3. Likewise, for the 2nd fraction, since 30 × 4 = 120,
    14/30 = 14 × 4/30 × 4 = 56/120
  4. Subtract the two like fractions:
    63/120 - 56/120 = 63 - 56/120 = 7/120

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